Button for removably fixing the suction disk of a set of teeth



E. A. SCHME REL. BUTTONTOR REMOVABLY FIXING THE SUCTION DISK OF A SET OF TEETH.

APPLICATION FILED DEC.23, I921- 1,424,35Q1.

JW an I W WMWXWA fMW/ I Pat elited Aug. 1, 1922.

ERICK ADOLF SCI-IMEREL, OF LEIPZIG, GERMANY.

BUTTON FOR REMOVABLY FIXING THE SUCTION DISK OF A SET OF TEETH.

Application filed December 23, 1921.

To all whom it may concern:

Be it known that I, Enron AnoLr SoHMnRnL, a citizen of the German Republic, residing at Leipzig, Germany, have invented certain new and useful Improvements in Buttons for Removably Fixing the Suction Disk of a Set of Teeth, of which the following is a specification.

For fixing sets of teeth in the mouth it is necessary to embed in the plate of the set of teeth made from caoutchouc a mould of the shape of the roof of the mouth and to vulcanize said mould with said plate. This mould plate consists in the well known manner of a knob composed of two parts made from a metal which can remain in the mouth and of a disk of soft metal placed around the neck and the upper surface of the knob. This disk is removed after the vulcanizing and replaced by a disk of soft india rubber placed around the neck of the knob and designed to make the plate stick to the roof of the mouth.

The use of such mould plates presents serious inconveniences. As it is not necessary that the india rubber disks be used continu ously the metal knob is rather disturbing, and it causes frequently inflammation of the mucous membranes. It is further difficult to avoid that caoutchouc adheres to the neck of the knob which hardens at the vulcanizing and is difficult to remove. It has been proposed to arrange packings around the neck of the knob in order to avoid the inconvenience which has just been mentioned but it is difficult to remove the packings after the vulcanizing.

This invention does not only avoid all these inconveniences but it further presents certain advantages.

This invention relates to double knobs whose upper part is removably connected with the neck in well known manner, for instance by means of screw threads.

In order that the invention may be clearly understood I shall proceed to describe the same with reference to the form of construction shown by way of example on the accompanying drawing, wherein Fig. 1 shows in vertical section, on larger than natural size, the improved double knob.

Fig. 2 represents the removable upper part of the knob.

' A is the plate of the set of teeth made from vulcanized caoutchouc. B is the disk of soft india rubber. The double knob con- Specification of Letters Patent.

Patented Aug. 1, 1922..

Serial No. 524,510. I

sists of the lower part a and of the upper part Z2. The neck 0 projecting from the lower part (1 consists of a hollow cylinder with internal screw threads. The upper part 7; has a downwardly projecting stud cl with outer thread. The lower part a of the knob has, according to this invention an annular groove 7 with which engages a protectlng sleeve 2' of the upper part b so that the threads are protected from saliva, rests of food or the like. A packing is inserted upon the bottom of the groove f.

In Fig. 1 the upper part b is shown of blconvex shape. The lower convexity serves to increase the going up of the edges of the rubber disk B and the upper convexity is designed to conform itself to the shape of the roof of the mouth and to prevent thus irritation of the mucous membranes.

When the double knob is to be fixed by vulcanization in the plate of the set of teeth an auxiliary convex upper part as shown in Fig. 2 is used.

When the set of teeth has to be used without sucking disk B a convex part as shown on Fig. 2 is substituted for the biconvex part b and for the rubber disk B, in order to close and cover the threaded sleeve 0.

It is evident that the threaded sleeve could be arranged at the upper part the threaded stud being mounted upon the'lower part.

I claim 1. An improved double knob for the removable fixation of a suction disk of artificial sets of teeth comprising in combination a lower part and an upper part, an externally threaded stud upon one of said parts surrounded by an annular groove, an internally threaded sleeve upon the other of said parts and a protecting sleeve adapted to engage with said annular groove.

2. An improved double knob for the removable fixation of a suction disk of artificial sets of teeth comprising in combination a lower part having an annular groove, an internally threaded sleeve upwardly projecting from said lower part and situated in said annular groove, an upper part, an externally threaded stud downwardly projecting from said upper part to be screwed into the sleeve of the lower part, a protecting sleeve concentrically arranged around said stud and designed to engage with said an nular groove and a rubber packing ring in said annular groove.

3. An improved double knob for the re used without the suction disk in the set of 10 teeth In testimony whereof I afib: my signature in presence of two witnesses.

ERICH AD OLF SCHMEREL.

lVitnesses BERKOLD 'MoMsnY, GERTRANDE BAGHMANN. 

